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Outdoor Noise Measurement Kit

outdoor noise measurement kit

The Sound Level Meters

The WPK-633 Outdoor Noise Kits can be supplied with any of the CEL63x range of sound level meter, from the lowest cost CEL632A2 to the top specification CEL633C1. The main decisions to make are:

  • Type 1 or Type 2 (Class 1 or Class 2)
  • Environmental noise parameters and timers?
  • Frequency analysis?

Our recommendation is to have either of the following.

  • CEL633A1 Sound Level Meter
    • A Type 1 Integrating sound level meter with additional environmental noise parameters, timers and data logging.
    • Outdoor Kit Order Code: WPK-633A1
  • CEL633C1 Sound Level Meter
    • Identical to the meter above but with real-time 1/3 octave band filters, for additional tonal noise analysis.
    • Outdoor Kit Order Code: WPK-633C1

Type 1 or Type 2

This defines the accuracy of the sound level meter in accordance with the ANSI S1.4 standard. Also referred to as "Class 1" or "Class 2" by the newer IEC 61672 standard. Although these standards are not identical, all the Type 1 meters mentioned here also meet IEC 61672 to Class 1. And the same for Type 2 / Class 2.

Many environmental noise regulations demand the use of a Type 1 / Class 1 integrating sound level meter. If your regulations or standards do not demand this then you can use Type 2, which costs a little less.

Our recommendation for environmental noise monitoring is to use Type 1. These microphones have a higher sensitivity and will measure lower sound levels, which can be important in quieter environments and at night.

Both of the meters that we recommend, the CEL633A1 and CEL633C1 are Type 1. Please contact us for a quotation for a Type 2 Outdoor Kit.

Environmental Noise Parameters and Timers

The lower cost CEL632 range of meters are very similar to the CEL633 range, but do not have the additional environmental noise parameters (such as LA10 and LA90), and do not have the advanced timers. For some applications this is not an issue, so the lower cost CEL632 might be suitable. If you are unsure then please contact us for advice as most environmental noise applications will require the additional features.

If you choose the CEL632 model then we can always upgrade it later to a CEL633 model.

Both of the meters that we recommend, the CEL633A1 and CEL633C1, include these environmental parameters and automatic timers. Please contact us if you need a quotation for a kit with the lower cost CEL632 range of meters.

Frequency Analysis

The "C" version of the meters have real-time Octave and 1/3 Octave Band Filters. These may be required for the analysis of tonal noise in some applications. This will be laid out in the regulations you are working to (if any exist). If you have any doubt then please contact us for advice.

If you are unsure then we can easily upgrade the CEL633A1 (without filters) to the CEL633C1 (with filters) without you having to return the equipment to us - we just send you a small program and access code to carry out the upgrade yourself.


Outdoor noise measurement kit
In stock
1/3 Octave Outdoor noise measurement kit
In stock


Weekly Rental
Rental of WPK-633C1 Outdoor Noise Measurement Kit
More pricing information

Similar Products

CEL633A Environmental Meter
Hand held data logging meter
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CEL633C Sound Level Meter
Data Logging with 1/3 Octaves
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How to Buy

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Prices and Ordering

These Outdoor Kits include the Meter, Calibrator, Case, Outdoor Microphone, Tripod, Software and all cables.

Order Code
Price (USD)
Outdoor Noise Measurement Kit with CEL633A1 Meter and Calibrator
In stock
Outdoor Noise Measurement Kit with CEL633C1 1/3 Octave Band Meter and Calibrator
In stock


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